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==========================================================================
Ubuntu Security Notice USN-3085-1
September 21, 2016

gdk-pixbuf vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

GDK-PixBuf could be made to crash or run programs as your login if it opened a
specially crafted file.

Software Description:
- gdk-pixbuf: GDK-Pixbuf library

Details:

It was discovered that the GDK-PixBuf library did not properly handle specially
crafted bmp images, leading to a heap-based buffer overflow. If a user or
automated system were tricked into opening a specially crafted bmp file, a
remote attacker could use this flaw to cause GDK-PixBuf to crash, resulting
in a denial of service, or possibly execute arbitrary code. This issue only
affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-7552)

It was discovered that the GDK-PixBuf library contained an integer overflow
when handling certain images. If a user or automated system were tricked into
opening a crafted image file, a remote attacker could use this flaw to cause
GDK-PixBuf to crash, resulting in a denial of service, or possibly execute
arbitrary code. This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS.
(CVE-2015-8875)

Franco Costantini discovered that the GDK-PixBuf library contained an 
out-of-bounds write error when parsing an ico file. If a user or automated
system were tricked into opening a crafted ico file, a remote attacker could
use this flaw to cause GDK-PixBuf to crash, resulting in a denial of service.
This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-6352)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
  libgdk-pixbuf2.0-0              2.32.2-1ubuntu1.2

Ubuntu 14.04 LTS:
  libgdk-pixbuf2.0-0              2.30.7-0ubuntu1.6

Ubuntu 12.04 LTS:
  libgdk-pixbuf2.0-0              2.26.1-1ubuntu1.5

After a standard system update you need to restart your session to make
all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-3085-1
  CVE-2015-7552, CVE-2015-8875, CVE-2016-6352

Package Information:
  https://launchpad.net/ubuntu/+source/gdk-pixbuf/2.32.2-1ubuntu1.2
  https://launchpad.net/ubuntu/+source/gdk-pixbuf/2.30.7-0ubuntu1.6
  https://launchpad.net/ubuntu/+source/gdk-pixbuf/2.26.1-1ubuntu1.5
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